及物动词

名词

1. a protective covering that covers or forms the top of a building

2. protective covering on top of a motor vehicle

3. an upper limit on what is allowed

e.g. he put a ceiling on the number of women who worked for him
there was a roof on salaries
they established a cap for prices

Synonym: ceilingcap

4. the inner top surface of a covered area or hollow space

e.g. the roof of the cave was very high
I could see the roof of the bear's mouth